Why are the human genitals darker in colour than the thigh skin ?? Is there any genetic reason ??
I don’t think this is a universal phenomenom. It certainly doesn’t apply to me. My genitals rarely (if ever) see the sun and are lighter than the rest of my skin, even in the winter.
Higher concentration of blood vessels in that area.
Assuming you’re talking about male genitals, I suspect it might also be because the skin is rather thicker in its flaccid state, to allow for the necessary stretching at, uh, non-flaccid moments.
This is most likely …